Issued Patents All Time
Showing 26–37 of 37 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5198204 | Method of forming dinitramide salts | Jeffrey C. Bottaro, Robert J. Schmitt, Paul E. Penwell | 1993-03-30 |
| 5089147 | Underdrain for granular medium filter | — | 1992-02-18 |
| 4976873 | Pulsing portions of a filter cell to extend a filter run | — | 1990-12-11 |
| 4818414 | Slime control for primary filtration systems | — | 1989-04-04 |
| 4745232 | Process for preparing 4,6-dinitroresorcinol | Robert J. Schmitt, James F. Wolfe | 1988-05-17 |
| 4642396 | Process for separating nitroaromatic compounds from spent nitric acid | Richard Van Court Carr, Bernard A. Toseland | 1987-02-10 |
| 4627923 | Apparatus and method of filtering solids from a liquid effluent | — | 1986-12-09 |
| 4570286 | Portable vacuum cleaning device | — | 1986-02-18 |
| 4476607 | Portable vacuum cleaning device | — | 1984-10-16 |
| 4447662 | Beta-dicarbonyl compounds for the promotion of aromatic nitration by nitrogen tetroxide | Robert M. Johnson, Ripudaman Malhotra | 1984-05-08 |
| 4417080 | Solvent modification of nitrations by N.sub.2 O.sub.4 /metal acetylacetonate systems | Robert M. Johnson, Ripudaman Malhotra | 1983-11-22 |
| 4298450 | Alcohols as hydrogen-donor solvents for treatment of coal | James Edward Blessing | 1981-11-03 |